/* 糖心Vlog官网 - 全局样式 */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-card: #1a1a1a;
  --text-primary: #f5f5f5;
  --text-secondary: #a0a0a0;
  --accent: #e63946;
  --accent-hover: #ff4d5a;
  --border: #2a2a2a;
  --radius: 12px;
  --max-width: 1200px;
  --header-height: 72px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-hover);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-link:hover {
  color: var(--text-primary);
}

.logo-link img {
  height: 40px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav a {
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--accent-hover) !important;
  color: #fff !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* Main */
main {
  flex: 1;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 720px;
  margin-bottom: 40px;
}

/* Hero */
.hero {
  padding: 80px 0 64px;
  background: linear-gradient(180deg, #1a0a0c 0%, var(--bg-primary) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: 2.5rem;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
  /* border: 1px solid var(--border); */
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}

.stat-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 8px;
}

/* Feature cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(230, 57, 70, 0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

/* Showcase */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.showcase-item img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  object-position: top;
  max-height: 480px;
}

.showcase-content {
  padding: 24px;
}

.showcase-content h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.showcase-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.showcase-content a {
  font-size: 0.9rem;
  font-weight: 600;
}

/* Content blocks */
.content-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.content-block.reverse {
  direction: rtl;
}

.content-block.reverse > * {
  direction: ltr;
}

.content-text h2 {
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.content-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.content-text ul {
  list-style: none;
  margin: 16px 0;
}

.content-text li {
  padding: 8px 0 8px 24px;
  position: relative;
  color: var(--text-secondary);
}

.content-text li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.content-image {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

/* FAQ */
.faq-list {
  max-width: 800px;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
}

.faq-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.faq-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Page content (legal) */
.page-hero {
  padding: 48px 0 32px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.breadcrumb {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--accent);
}

.legal-content {
  padding: 48px 0 64px;
  max-width: 800px;
}

.legal-content h2 {
  font-size: 1.35rem;
  margin: 32px 0 12px;
  color: var(--text-primary);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.legal-content ul,
.legal-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.legal-content li {
  margin-bottom: 8px;
}

/* Error pages */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px 24px;
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.error-page h1 {
  font-size: 1.75rem;
  margin: 16px 0 12px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-keywords {
  font-size: 0.8rem;
  color: #666;
  margin-top: 16px;
  line-height: 1.6;
}

/* Intro & rich text */
.intro-block {
  max-width: 900px;
}

.intro-block p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.intro-block h2 {
  font-size: 1.75rem;
  margin-bottom: 20px;
}

/* Channel nav pills */
.channel-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 32px;
}

.channel-nav a {
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9rem;
  background: var(--bg-card);
}

.channel-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Image gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gallery-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}

.gallery-item:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  object-position: top;
}

.gallery-caption {
  padding: 14px 16px;
}

.gallery-caption h3 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.gallery-caption p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Detail panel - large image sections */
.detail-panel {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 40px;
  align-items: start;
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 28px;
}

.detail-panel.reverse {
  grid-template-columns: 1fr 380px;
}

.detail-panel.reverse .detail-image {
  order: 2;
}

.detail-panel.reverse .detail-text {
  order: 1;
}

.detail-image {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  position: sticky;
  top: 90px;
}

.detail-image img {
  width: 100%;
  display: block;
}

.detail-text h3 {
  font-size: 1.4rem;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.detail-text h4 {
  font-size: 1.05rem;
  margin: 20px 0 10px;
  color: var(--accent);
}

.detail-text p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.detail-text ul {
  list-style: none;
  margin: 12px 0;
}

.detail-text li {
  padding: 6px 0 6px 22px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.93rem;
}

.detail-text li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.detail-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(230, 57, 70, 0.12);
  color: var(--accent);
  border-radius: 6px;
  font-size: 0.8rem;
  margin-bottom: 12px;
}

/* Dual image row */
.dual-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.dual-images .content-image img {
  width: 100%;
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.step-num {
  width: 40px;
  height: 40px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 0 auto 14px;
}

.step-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* CTA banner */
.cta-banner {
  background: linear-gradient(135deg, #1a0a0c 0%, #2a1015 50%, #1a0a0c 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  margin-top: 16px;
}

.cta-banner h2 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.cta-banner p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 28px;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-grid,
  .content-block,
  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .content-block.reverse {
    direction: ltr;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .detail-panel,
  .detail-panel.reverse {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .detail-panel.reverse .detail-image,
  .detail-panel.reverse .detail-text {
    order: unset;
  }

  .detail-image {
    position: static;
    max-width: 320px;
    margin: 0 auto;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .dual-images {
    grid-template-columns: 1fr;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 32px 20px;
  }
}